Selling my phone. Did full wipe, etc, but how to get rid of MIN, username, etc..

Im selling my Sprint GS3 as rooted, and I wiped everything so the rom is freshly installed, but under about device / status / it still shows the Sprint username associated with the account and my phone number and MIN. Is there any way to delete those blocks before selling the phone to a new buyer? I know that goes away once they activate it on their own, but I'd like to get rid of that data so they can't see it period.

If yes, then this is how I have always done it with my previous Samsung phones.

To delete your Sprint username, go to "Phone" and dial ##DATA# (##3282#)
"Data programming" screen should show up. Tap "Edit" and it should ask for your phone's MSL#. I'm currently using the MOAR Rom so for some reason it bypasses the MSL screen. Then tap "Data Profile" where you will be able to delete or edit your "Username"

For editing or deleting your MDN/MIN, go to "Phone" and dial ##MSL#. If your MSL is 123456 dial ##123456#
"MSL NAM info" should show up then tap "Edit" to edit or delete your numbers. I usually just put all zeros. Phone may restart after doing this.

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